Excellent news, indeed I was a bit surprised by the quick appearance of 1.1. My compliments to the team!
That sounds like you want a bit of (archaic) Windows behaviour in NetSurf! Like rjek points out, NetSurf simply follows standard RISC OS GUI behaviour. It's quite typical though; most newcomers to the Mac also find this behaviour odd, since OS X mostly behaves like RISC OS in this respect. Personally I find the Windows approach such dated behaviour, which stems from the low-resolution, pre-drag&drop, single-app focus days... RISC OS and NeXTSTEP got it right at the beginning!
Support for tabbed browsing would be very cool in NetSurf, which could be implemented in a RISC OS friendly manner by providing suitable configuration options. For the time being, I simply iconise new windows.